Significant Accounting Policies - Schedule of Aggregate Warranty Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Standard Product Warranty Disclosure [Abstract]
Warranty reserve beginning balance	$ 3,336
Warranty accrual for battery deficiencies	6,430	$ 3,200
Warranty accrual for completed projects	1,204	170
Warranty settlements	(4,864)	(34)
Warranty reserve ending balance	$ 6,106	$ 3,336

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1),(c)(5)
-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

Name:	us-gaap_StandardProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant